Substitute in the given equation and find the unknown quantity.

Substitute in the given equation and find the unknown quantity.
1. Given: vavg = vf + vi/2 vf = 6.20 m/s vi = 3,900 m/s vavg =?
2. Given: a = vf + vi/t a = 3.07 m/s2 vf = 16.8 m/s t = 4.10 s vi =?
3. Given: s = vit + ½ at2 t = 3.00s a = 6.40 m/s2 vi = 33.0 m/s s =?
4. Given: 2as = v2f – v2i a = 8.41 m/s2 s = 4.81 m vi = 4.81 m vf =?
5. Given: vf = vi + at vf = 10.40 ft/s vi = 4.01 ft/s t = 3.00 s a =?


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